I think Eric Frankenstein could remain an Anti-hero as it keeps him relatable and complex. Kind of similar to Deadpool. However Eric just needs to find the right people or monsters so that he can properly develop his moral compass and yeah he will have darker instincts as do all the creature commandos do. So I would say that he is misguided in the first season hung up on the bride as he sees it. She is like him physically and therefore the only one can truly be with. But I think he could come to learn that she does not love him. Or going deeper. Maybe she starts seeing him in a different way and decides to give him a chance. But like all the monsters. He could be a antihero and fight for good but in a bad way. Which could lead to potential conflicts with batman and maybe superman